57672-91-0 A-Homo-24-nor-4-oxa-6,7-secochola-7,20,22-triene-6-carboxylic acid, 1-(acetyloxy)-4a-((acetyloxy)methyl)-21,23-epoxy-11-(formyloxy)-14-hydroxy-12-((2-hydroxy-3-methyl-1-oxopentyl)oxy)-4a-methyl-3,15-dioxo-, methyl ester, (1alpha,4abeta,5beta,11beta,12alpha(2R,3R),13alpha,14beta,17alpha)- NSC 312621 Prieurianin